Lawn-trimmer.



' B ELsTovmL' LAWN TRIMMER.

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` l v s I l f1 f .1". E'. STOVER.

LAWN TBIMMER. y APPLICATION FILED 00T. 9;' 1911. BBNBvWED AUG. 16, 1912.

' v Patented 111111.25, 1913. v

3 SHEETS-SHEET 2.

F. E. STOVER.

LAWN TRIMMER. APPLIoATxol Hmm 4oo'r. 9,1911'. mmmylm AUG. 1e; 1912.

3 SHEETS-SHEET 3.

3mm/Mofa wm MfS/@v60 I u l @www UNITED STATES PATENT Ormea.

FRANCIS E. STOVER, -OIEA MUSKEQON, MICHIGAN.

, LAWN-'mammina Application led October 9 1911, SerialzNc, 653,673. Renewed-August 16, 1912. Serial No. 715,524.y

To all whom t may concern: f

Be it known that I, FRANCIS E.' STOVER, a

citizen of the United States, residing at' Muskegon, in the county of Muskegon and State of Michi an, lhave invented certain new and usefu Improvements'. in LawnrIrimmers, of which the following is a specification. t Ap `My invention relates to improvements 1n lawn trimmers, and has for its leading object the provision of anovel and improved device for use -in trimming lawns which will serve to satisfactorily and neatly cutl removed and changed from one side of the trimmer to the other to facilitate use of the trimmer near a walll or building. p

Another object'of the invention is the provision of an improved form of cutters and of novel and improved means for securing the cutters to the machine and for shifting certain of the same to operate the trimmer.

Other objects and advantages of my im-l proved lawn trimmer will be readily apparent by reference to the following description taken in connection with the accompanying drawings, and it will be understood that I may make an modifications in the specific structure s own and described within the scope of the lappended claims without departing from or exceeding the spirit of my invention. v

Figure 1 represents a side elevation of my improved trimmer.' Fig. 2 represents a top plan view thereof. Fig. 3 represents an enlarged lan view ofl the cutters removed illustratingl a different position of the movable cutters. Fig. 4 represents a detailed View of the movablecutters. Fig. 5 represents a sectional view on the line 5-5 of Fig. l. Fig. 6 represents a sectional View on the line 6 6 ofFig. 3. FigVZ'represents a perspective view o f the roller bearing yoke for engaging the corrugated rib of the c ombined supporting and drive wheel. Fig. 8 represents a view of the handle of my ofv the stationar ters of reference are employed to denote corresponding parts in the several views, the numeral 1 designatesthe U-shaped bearing yoke of my invention having secured to its arms the spindle 2 for 4the hub 3 having radiating therefrom the spokes 4 formed intelgral withy the corrugated or undulating ri 5. A wide rim 6 is formed on the rib 5 and has a knurled or roughened tread surface to catch on the turf and prevent sliding of the wheel. The said yoke 1 has the twisted lower ends 7 to which are secured by the bolts 8 the rear ends of the furcations 10 knife blade member 11 which has the orwardly pro'ecting knife side-ngers 12 and a `central finger 12 for engaging the grass to bej cut, said fingers having ,the sharpened or beveled cutting ed es 13.

ngaged in the centralv portion of the blade 11 is the pivot bolt 14 on which is ,mounted the forward end of the Y-shaped l yokeor casting 15 which has rearwardly eX- tending Aarms 16 spanning the rim 6'of thel wheel, one of said armsy having the inwardly i extending furcation 17 between which is rotatably mounted the antifriction roller 18 which bears 4against `one side of the rib 5.v

The other arm of the yoke 15 is reduced in thickness and has mounted thereon the supy plemental arm 19 having' the furcations 20 E4between which is secured the roller 21. Saidl roller is spaced a sufficient distance from the roller 18 to just permit the rib 5 to movepasses the bolt 24 engaged inthe yoke.v

Tightening ofSsaid bolt 24 serves Ato clam the arm 19 and thus its roller in adjuste position relative to the yoke and its roller. It will `thus be seen that as the machine is Specica'cion-of Letters` Patent. l Patented Mar, 25,1913;

moved over the ground thel undulating portion of the supporting wheel will serve toy y' rockthe yoke, while to cut the grass over Y. which the machine is passing I form in the under face of the stem of the shifting yoke the recess 25 into which t the rear endsl close to a wall or other obstruction and to facilitate the propulsion thereof I form' in each side of the bearing yoke 1 the key-hole slots30 conver ing downwardly and adapted to allow the eads 31 of the lugs or bolts 32 to pass through their upper ends and be engaged .in the lower portions of the slots.

Sald lugs are carried by the inner face of the han le 33 which may thus be secured to either side of the-bearing yoke, the'handle having a transversely disposed grip portion projectingI from its upper end on the opposite side Vfrom the lugslas is clearly shown in the drawings. The iife blades 26 have theirforward portions curving slightly downward, while to resiliently force the same against the frame blade I mount in the recess 25 the .Spring 34m-ving mii-gerst .35'

bearing down upon the blades 26.

`From the fore oing descriptiontaken in connection with t e accompanying drawings the construction and operation of my improved lawn trimming machme will be readily apparent, and it will be seen that` I have provided a simple and inexpensive machine of this character which is operated by Eearin merely pushing the saine` over the lawn to be cut and which will serve to smoothly cut any height of grass and will prove especially desirable for cuttin grass at the edge of awalk, the side of a ouse or other inaccessible place for users of ordinary lawn mowers, and which machine will be highly eicient in every particular.

I claim 1. A lawn trimmer,pincludin a bearing yoke, a wheel rotatably mounte within the yoke and having an undulating portion arranged 'at right angles to the tread of the wheel, a stationary knife member secured to l the yoke and spanning the wheel, a yoke ivoted 'to the stationary knife member and knife blades, and rollers rotatably secure to the ends of the pivoted yoke and engaging the undulating portion of the wheel, whereby rotation of the wheel shifts the yoke to oscillate the knives carried by the yoke. y 1 y 2. A. lawn trimmer, -including a -frame yoke, a knife member having furcations secured to said yoke, a wheel rotatably secured ;to the frame yoke and having an undulating rib arranged at right an les to the tread thereof, a yoke pivoted to t e blade and having its arms ad'ustable. relative to each other, rollers carried by the arms for engaging the undulatin rib, knife blades secured to the pivoted yo e, and a spring bearing against said blades for resiliently holdlng `the same in engagement with the frame blade member. `In testimony whereof I aix my slgnature, in the presence of two witnesses.

FRANCIS E. STOVER.

Witnesses:

`ANNA J. Bancos, FRANK I. SWEET. 

